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LED Resistor Value Calculator – Kitronik Ltd
Resistors for LED Circuits | Resistor Applications | Resistor Guide
Could someone help me understand why (in the circuit pictured) it doesn't matter if the resistor is positioned after the LED? : r/AskElectronics
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L1: Turning on an LED - Physical Computing
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L1: Turning on an LED - Physical Computing
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encoder-controlled led lights - does anyone know why the blue leds are less bright than the red one? : r/arduino
